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3 years ago

The Hertzsprung-Russel diagram is used to show the relationship between which two characteristics of stars?

2 answers:

7 0

Between the stars' absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

larisa [96]3 years ago

5 0

<h3>Answer;</h3>

Luminosity and temperature of a star

<h3>Explanation;</h3>

Hertzsprung-Russel diagram or HR diagram is a scatter plot or a graphical tool that is used by astronomers to classify stars based on their luminosity, color, temperature, spectral type and also the stage of evolution.
The HR diagram plots the temperature of the stars against the luminosity, or the color of starts against absolute magnitude.

The HR diagram is divided into stages, for example those stars at the stable phase of hydrogen burning are found within the main sequence according to their mass.

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a radioactive element has a half-life of 30 days. calculate the mass of the element that remains after 20 days if 100g of the el

patriot [66]

Explanation:

the answer is in the image above

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3 years ago

An insulated rigid tank contains 4 kg of argon gas at 450 kPa and 30°C. A valve is now opened, and argon is allowed to escape un

zheka24 [161]

Answer: The final mass of the tank is 2.46kg

Explanation: All shown in the attachment.

Assumptions:

i. Argon is treated as an ideal gas at the specified conditions.

ii. Isentropic relation of ideal gas applies at the given conditions.

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3 years ago

Calculate the frequency of each of the following wave lengths of electromagnetic radiation. Part A 488.0 nm (wavelength of argon

Drupady [299]

Answer:

A. $f=6.1475*10^{14}Hz$

B. $f=5.9642*10^{14}Hz$

Explanation:

The frequency has an inversely proportional relationship with the concept of wavelength, the greater the wavelength, the lower the frequency. For electromagnetic waves, the frequency is equal to the speed of light, divided by the wavelength.

$f=\frac{c}{\lambda}$

$f=\frac{3*10^8\frac{m}{s}}{488*10^{-9}m}\\\\f=6.1475*10^{14}Hz$

$f=\frac{3*10^8\frac{m}{s}}{503*10^{-9}m}\\\\f=5.9642*10^{14}Hz$

7 0

4 years ago

Please help me! I don’t understand how to solve this problem.

skelet666 [1.2K]

What's the weight of the pear ?

Weight = (mass) x (gravity) = (1 kg) x (9.8 m/s²) = 9.8 Newtons.

OK. We know there's a force of 9.8 Newtons acting downwards on the pear.

Is the pear accelerating ? No ! It's just laying there on the table.

If it's not accelerating, then we know that the net force on it must be zero.

So there must be ANOTHER force acting UPWARDS on it, to exactly

cancel out the downward force of its weight. THAT's the "normal" force ...

the upward force that the table exerts on the pear. It must also be 9.8N,

but UPwards, so that if you add it to the weight, the sum is zero.

6 0

3 years ago

What type of air mass would form over the northern atlantic ocean?

Feliz [49]

Answer:

Maritime polar air masses form over the northern Atlantic ocean

Explanation:

Maritime polar (mP) air masses are cool, moist, and also unstable. Some maritime polar air masses arise as continental polar air masses over Asia and move westward over the Pacific, gathering warmth and moisture from the ocean. .

7 0

3 years ago